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surfactant protein

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https://www.readbyqxmd.com/read/29164837/serum-surfactant-protein-d-and-exhaled-nitric-oxide-as-biomarkers-of-early-lung-damage-in-systemic-sclerosis
#1
Alida Benfante, Riccardo Messina, Alessandra Paternò, Nicola Scichilone
BACKGROUND: Interstitial lung disease (ILD) complicates the course of systemic sclerosis (SSc), representing the main cause of death in these patients. The identification of parameters that can predict the early onset and progression of ILD in SSc represents an unmet need in clinical practice. The study was designed to explore whether the surfactant proteins (SP) A and D may be used as noninvasive tools for the early identification of ILD in SSc. Alveolar exhaled nitric oxide (NO) was investigated as a surrogate marker of distal inflammation...
November 21, 2017: Minerva Medica
https://www.readbyqxmd.com/read/29163395/role-of-soluble-innate-effector-molecules-in-pulmonary-defense-against-fungal-pathogens
#2
REVIEW
Soledad R Ordonez, Edwin J A Veldhuizen, Martin van Eijk, Henk P Haagsman
Fungal infections of the lung are life-threatening but rarely occur in healthy, immunocompetent individuals, indicating efficient clearance by pulmonary defense mechanisms. Upon inhalation, fungi will first encounter the airway surface liquid which contains several soluble effector molecules that form the first barrier of defense against fungal infections. These include host defense peptides, like LL-37 and defensins that can neutralize fungi by direct killing of the pathogen, and collectins, such as surfactant protein A and D, that can aggregate fungi and stimulate phagocytosis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29161089/protein-folding-and-the-challenges-of-maintaining-endoplasmic-reticulum-proteostasis-in-idiopathic-pulmonary-fibrosis
#3
Freddy Romero, Ross Summer
Alveolar epithelial type II (AEII) cells are "professional" secretory cells that synthesize and secrete massive quantities of proteins to produce pulmonary surfactant and maintain airway immune defenses. To facilitate this high level of protein synthesis, AEII cells are equipped with an elaborate endoplasmic reticulum (ER) structure and possess an abundance of the machinery needed to fold, assemble, and secrete proteins. However, conditions that suddenly increase the quantity of new proteins entering the ER or that impede the capacity of the ER to fold proteins can cause misfolded or unfolded proteins to accumulate in the ER lumen, also called ER stress...
November 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29160134/surfactant-protein-a-nanobody-conjugated-liposomes-loaded-with-methylprednisolone-increase-lung-targeting-specificity-and-therapeutic-effect-for-acute-lung-injury
#4
Nan Li, Dong Weng, Shan-Mei Wang, Yuan Zhang, Shan-Shan Chen, Zhao-Fang Yin, Jiali Zhai, Judy Scoble, Charlotte C Williams, Tao Chen, Hui Qiu, Qin Wu, Meng-Meng Zhao, Li-Qin Lu, Xavier Mulet, Hui-Ping Li
The advent of nanomedicine requires novel delivery vehicles to actively target their site of action. Here, we demonstrate the development of lung-targeting drug-loaded liposomes and their efficacy, specificity and safety. Our study focuses on glucocorticoids methylprednisolone (MPS), a commonly used drug to treat lung injuries. The steroidal molecule was loaded into functionalized nano-sterically stabilized unilamellar liposomes (NSSLs). Targeting functionality was performed through conjugation of surfactant protein A (SPANb) nanobodies to form MPS-NSSLs-SPANb...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/29159721/design-synthesis-in-silico-and-in-vitro-antimicrobial-screenings-of-novel-1-2-4-triazoles-carrying-1-2-3-triazole-scaffold-with-lipophilic-side-chain-tether
#5
Mohamed Reda Aouad, Mariem Mohammed Mayaba, Arshi Naqvi, Sanaa K Bardaweel, Fawzia Faleh Al-Blewi, Mouslim Messali, Nadjet Rezki
BACKGROUND: 1,2,4-Triazoles and 1,2,3-triazoles have gained significant importance in medicinal chemistry. RESULTS: This study describes a green, efficient and quick solvent free click synthesis of new 1,2,3-triazole-4,5-diesters carrying a lipophilic side chain via 1,3-dipolar cycloaddition of diethylacetylene dicarboxylate with different surfactant azides. Further structural modifications of the resulting 1,2,3-triazole diesters to their corresponding 1,2,4-triazole-3-thiones via multi-step synthesis has been also investigated...
November 21, 2017: Chemistry Central Journal
https://www.readbyqxmd.com/read/29158276/seventy-five-years-of-research-on-protein-binding-do-we-ever-understand
#6
Axel Dalhoff
This review summarizes evidence that the impact of protein binding of the activity of antibiotics is multifacetted and more complex than indicated by the numerical value of protein binding alone. A plethora of studies has proven that protein binding of antibiotics matters - the free fraction only is antibacterially active and governs pharamcokinetics. Several studies have indicated that independent from protein binding immunoglobulin G, albumin, α-1-acid-glycoprotein, and pulmonary surfactant acted synergistically with antibacterial agents, thus suggesting that some intrinsic properties of serum proteins may have mediated serum antibiotic synergisms...
November 20, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29156513/production-and-characterization-of-keratinolytic-proteases-by-a-chicken-feather-degrading-thermophilic-strain-thermoactinomyces-sp-yt06
#7
Lin Wang, Yuting Qian, Yun Cao, Ying Huang, Zhizhou Chang, Hongying Huang
Thermoactinomyces sp. strain YT06 was isolated from poultry compost and observed to degrade integral chicken feathers at 60°C completely, resulting in the formation of 3.24 mg/mL of free amino acid from 50 mL of culture containing 10 g/L chicken feathers. Strain YT06 could grow and secret keratinase using feather as the only carbon and nitrogen sources without other supplement, but complementation of 10 g/L sucrose and 4 g/L NaNO₃ increased the production of the keratinolytic enzyme. The maximum protease activities obtained were 110 U/mL and keratinase were 42 U/mL...
November 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29155599/recombinant-fragment-of-human-surfactant-protein-d-a-hierarchical-regulator-of-pulmonary-hypersensitivity
#8
Taruna Madan
No abstract text is available yet for this article.
November 20, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29155458/localization-of-surfactant-protein-d-in-the-rheumatoid-synovial-membrane
#9
Anne Friesgaard Christensen, Grith Lykke Sorensen, Kirsten Junker, Peter Hvidbak Revald, Claus Varnum, Flemming Brandt Sorensen, Peter Junker
Surfactant protein-D (SP-D) is a collectin, which plays an important role in airway protection and inflammation. The molecule has both pro- and anti-inflammatory capacities depending on its molecular size. Its involvement in joint diseases is largely unknown and the aim of this investigation was to study SP-D occurrence and distribution in the synovial membrane of patients with long-standing rheumatoid arthritis (RA) and osteoarthritis (OA). Six RA patients and six OA patients, who underwent total hip arthroplasty, were included in the study...
November 20, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/29155085/ir-spectroscopy-analysis-of-pancreatic-lipase-related-protein-2-interaction-with-phospholipids-2-discriminative-recognition-of-various-micellar-systems-and-characterization-of-plrp2-dppc-bile-salt-complexes
#10
Eduardo Mateos-Diaz, Priscila Sutto-Ortiz, Moulay Sahaka, Deborah Byrne, Hélène Gaussier, Frédéric Carrière
The interaction of pancreatic lipase-related protein 2 (PLRP2) with various micelles containing phospholipids was investigated using pHstat enzyme activity measurements, differential light scattering, size exclusion chromatography (SEC) and transmission IR spectroscopy. Various micelles of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and lysophosphatidylcholine were prepared with either bile salts (sodium taurodeoxycholate or glycodeoxycholate) or Triton X-100, which are substrate-dispersing agents commonly used for measuring phospholipase activities...
November 16, 2017: Chemistry and Physics of Lipids
https://www.readbyqxmd.com/read/29150411/an-epithelial-biomarker-signature-for-idiopathic-pulmonary-fibrosis-an-analysis-from-the-multicentre-profile-cohort-study
#11
Toby M Maher, Eunice Oballa, Juliet K Simpson, Joanne Porte, Anthony Habgood, William A Fahy, Aiden Flynn, Philip L Molyneaux, Rebecca Braybrooke, Hrushikesh Divyateja, Helen Parfrey, Doris Rassl, Anne-Marie Russell, Gauri Saini, Elisabetta A Renzoni, Anne-Marie Duggan, Richard Hubbard, Athol U Wells, Pauline T Lukey, Richard P Marshall, R Gisli Jenkins
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a progressive, fatal disorder with a variable disease trajectory. The aim of this study was to assess potential biomarkers to predict outcomes for people with IPF. METHOD: PROFILE is a large prospective longitudinal cohort of treatment-naive patients with IPF. We adopted a two-stage discovery and validation design using patients from the PROFILE cohort. For the discovery analysis, we examined 106 patients and 50 age and sex matched healthy controls from Nottingham University Hospitals NHS Trust and the Royal Brompton Hospital...
November 14, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29149889/electronic-cigarette-vapor-alters-the-lateral-structure-but-not-tensiometric-properties-of-calf-lung-surfactant
#12
Rebecca J Przybyla, Jason Wright, Rajan Parthiban, Saeed Nazemidashtarjandi, Savas Kaya, Amir M Farnoud
BACKGROUND: Despite their growing popularity, the potential respiratory toxicity of electronic cigarettes (e-cigarettes) remains largely unknown. One potential aspect of e-cigarette toxicity is the effect of e-cigarette vapor on lung surfactant function. Lung surfactant is a mixture of lipids and proteins that lines the alveolar region. The surfactant layer reduces the surface tension of the alveolar fluid, thereby playing a crucial role in lung stability. Due to their small size, particulates in e-cigarette vapor can penetrate the deep lungs and come into contact with the lung surfactant...
November 17, 2017: Respiratory Research
https://www.readbyqxmd.com/read/29149883/serum-concentrations-of-krebs-von-den-lungen-6-surfactant-protein-d-and-matrix-metalloproteinase-2-as-diagnostic-biomarkers-in-patients-with-asbestosis-and-silicosis-a-case-control-study
#13
Changjiang Xue, Na Wu, Xue Li, Meihua Qiu, Xuqin Du, Qiao Ye
BACKGROUND: Asbestosis and silicosis are progressive pneumoconioses characterized by interstitial fibrosis following exposure to asbestos or silica dust. We evaluated the potential diagnostic biomarkers for these diseases. METHODS: The serum concentrations of Krebs von den Lungen-6 (KL-6), surfactant protein D (SP-D), and matrix metalloproteinase-2 (MMP-2), MMP-7, and MMP-9 were measured in 43 patients with asbestosis, 45 patients with silicosis, 40 dust-exposed workers (DEWs) without pneumoconiosis, and 45 healthy controls (HCs)...
November 17, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29146968/heterologous-expression-and-characterization-of-a-new-lipase-from-pseudomonas-fluorescens-pf0-1-and-used-for-biodiesel-production
#14
Wu Liu, Menggang Li, Yunjun Yan
As a kind of important biocatalysts, Pseudomonas lipases are commonly applied in various industrial fields. Pflip1, a new extracellular lipase gene from Pseudomonas. fluorescens Pf0-1, was first cloned and respectively expressed in Escherichia coli BL21(DE3) and Pichia pastoris KM71, the recombinant proteins Pflip1a and Pflip1b were later purified separately. Then Pflip1a was further characterized. The optimum pH of Pflip1a was 8.0 and its optimal temperature was 70 °C. After incubation at 70 °C for 12 h, Pflip1a could retain over 95% of its original activity...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146538/rational-design-of-polysorbate-80-stabilized-human-serum-albumin-nanoparticles-tailored-for-high-drug-loading-and-entrapment-of-irinotecan
#15
Neetika Taneja, Kamalinder K Singh
Human serum albumin (HSA) nanoparticles are considered to be versatile carrier of anticancer agents in efficiently delivering the drug to the tumor site without causing any toxicity. The aim of the study was to develop stable HSA nanoparticles (NPs) of drug irinotecan (Iro) having slightly water solubility and moderate HSA binding. A novel strategy of employing a hydrophilic non-ionic surfactant polysorbate 80 which forms protein-polysorbate 80 complex with increased affinity and improvement in Iro-HSA binding has been used to maximize the loading and entrapment efficiency of Iro in HSA-NPs...
November 13, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29144728/simultaneous-analysis-of-a-non-lipidated-protein-and-its-lipidated-counterpart-enabling-quantitative-investigation-of-protein-lipidation-s-impact-on-cellular-regulation
#16
Agnesa Shala-Lawrence, Melanie Jane Blanden, Svetlana M Krylova, Soumyashree A Gangopadhyay, Stanislav S Beloborodov, James L Hougland, Sergey N Krylov
Here we introduce Protein-Lipidation Quantitation (PLQ) - the first method for quantitative analysis of both a substrate and a product of protein lipidation in a biologically relevant context. Such analysis is required to study roles of protein lipidation in cellular regulation. In PLQ, the substrate is fused with a fluorescent protein to facilitate quantitative detection of both the non-lipidated substrate and the lipidated product. When expressed in cells with endogenous lipidation activity, the substrate is intracellularly lipidated...
November 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29142162/chloroform-extract-of-turmeric-inhibits-biofilm-formation-eps-production-and-motility-in-antibiotic-resistant-bacteria
#17
Sumreen Hayat, Anjum N Sabri, Timothy D McHugh
In the form of biofilms, bacteria exhibit more resistance to antibiotics. Biofilm formers can withstand severe conditions and the host's defense system. Therefore, it is necessary to search for effective biofilm inhibitors. In this study, we investigated the effect of a chloroform extract of turmeric on biofilm formation against antibiotic resistant bacteria. The extract exhibited its antibiofilm effect by altering adherence, motility, extracellular polymeric substance (EPS) production and cell surface hydrophobicity; important attributes of biofilm formation...
November 15, 2017: Journal of General and Applied Microbiology
https://www.readbyqxmd.com/read/29138064/bicontinuous-microemulsions-as-a-biomembrane-mimetic-system-for-melittin
#18
Douglas G Hayes, Ran Ye, Rachel N Dunlap, Divina B Anunciado, Sai Venkatesh Pingali, Hugh M O'Neill, Volker S Urban
Antimicrobial peptides effectively kill antibiotic-resistant bacteria by forming pores in prokaryotes' biomembranes via penetration into the biomembranes' interior. Bicontinuous microemulsions, consisting of interdispersed oil and water nanodomains separated by flexible surfactant monolayers, are potentially valuable for hosting membrane-associated peptides and proteins due to their thermodynamic stability, optical transparency, low viscosity, and high interfacial area. Here, we show that bicontinuous microemulsions formed by negatively-charged surfactants are a robust biomembrane mimetic system for the antimicrobial peptide melittin...
November 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29138038/low-dose-betamethasone-acetate-for-fetal-lung-maturation-in-preterm-sheep
#19
Augusto F Schmidt, Matthew W Kemp, Judith Rittenschober-Böhm, Paranthaman S Kannan, Haruo Usuda, Masatoshi Saito, Lucy Furfaro, Shimpei Watanabe, Sarah Stock, Boris W Kramer, John P Newnham, Suhas G Kallapur, Alan H Jobe
BACKGROUND: Antenatal steroids (ANS) are standard of care for women at risk of preterm delivery; however ANS dosing and formulation have not been adequately evaluated. The standard clinical 2-dose treatment with betamethasone-acetate+betamethasone-phosphate (Beta-P+Beta-Ac) is more effective than 2 doses of Beta-P for inducing lung maturation in preterm fetal sheep. We hypothesized that the slowly-released Beta-Ac component induces similar lung maturation to Beta-P+Beta-Ac with decreased dose and fetal exposure...
November 11, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29135404/-bilateral-total-lung-lavage-in-a-patient-with-pulmonary-alveolar-proteinosis
#20
Müge Erbay, Yılmaz Bülbül, Funda Öztuna, Mehmet Kılıç, Neslihan Özçelik, Şafak Ersöz
Pulmonary alveolar proteinosis (PAP) is a rare pulmonary disease characterised by alveolar accumulation of surfactant composed of proteins and lipids. Three main categories of PAP have been defined depending on the aetiology: primer/idiopathic, neonatal/congenital, secondary and exogenous/environmental exposure. Radiologically diffuse ground glass opacities, interlobular and intralobular septal thickening is seen. Although open lung biopsy is accepted as the gold standard in diagnosis, it can be diagnosed by showing bronchoalveolar lavage (BAL) fluid with a milky appearance and periodic acid-schiff (PAS) positive globules in biopsy with clinical and radiological findings...
September 2017: Tüberküloz Ve Toraks
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